Fallen - Deborah Cooke

At the end of the 21st century, the future of humanity hangs in the balance, caught between the radioactive waste of a half century of nuclear wars and the repressive authority of the Republic. Angels sacrifice their wings to join a secret fraternity of freedom fighters, risking classification as mutants and consignment to the Republic's slave dens. Each warrior is a volunteer, but no angel anticipates the full cost of his fall.

The Eyes of the Republic are Everywhere.

Lilia Desjardins has never played by the rules and she isn't about to start when her estranged husband's death is declared an accident. Lilia knows Gid better than that, and if anyone is owed justice, it's the most decent man she's ever known. She leaves all she knows to risk the dark heart of the Republic—only to discover that her deepest secret has been uncovered and will be used against her by forces unknown.

Adam Montgomery will do anything to complete his earthly mission and return to the existence he knows, even if he has to seduce the enigmatic Lilia Desjardins. But when his contact is murdered and he must rely upon Lilia's silence to save him from the slave dens, Adam knows that his wings might be only his first sacrifice.

As danger and intrigue surround them, Lilia and Adam realize they must work together—body, mind, and soul—in order to save the world.

This series was previously published under the pseudonym Claire Delacroix.